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US6735890B2 - Wear assembly - Google Patents

Wear assembly Download PDF

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Publication number
US6735890B2
US6735890B2 US09/899,535 US89953501A US6735890B2 US 6735890 B2 US6735890 B2 US 6735890B2 US 89953501 A US89953501 A US 89953501A US 6735890 B2 US6735890 B2 US 6735890B2
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US
United States
Prior art keywords
accordance
wear
socket
lock
wear assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime, expires
Application number
US09/899,535
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English (en)
Other versions
US20030005606A1 (en
Inventor
Christopher M. Carpenter
Robert S. Fleck
Terry L. Briscoe
Daniel R. Danks
Venkat R. Gaurav
Larren F. Jones
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Esco Group LLC
Original Assignee
Esco Corp
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Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25411164&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=US6735890(B2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Esco Corp filed Critical Esco Corp
Priority to US09/899,535 priority Critical patent/US6735890B2/en
Assigned to ESCO CORPORATION reassignment ESCO CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: DANKS, DANIEL R., FLECK, ROBERT S., CARPENTER, CHRISTOPHER M., GAURAV, VENKAT R., BRISCOE, TERRY L., JONES, LARREN F.
Priority to US10/187,446 priority patent/US6993861B2/en
Priority to DK05027595.7T priority patent/DK1637661T3/da
Priority to BRPI0210854-2A priority patent/BR0210854B1/pt
Priority to AT02749630T priority patent/ATE452248T1/de
Priority to CA002451309A priority patent/CA2451309C/fr
Priority to BRPI0216099-4B1A priority patent/BR0216099B1/pt
Priority to PT02749630T priority patent/PT1404925E/pt
Priority to ES02749630T priority patent/ES2336897T3/es
Priority to CN2006100740567A priority patent/CN1837518B/zh
Priority to AT05027594T priority patent/ATE450663T1/de
Priority to EP05027594A priority patent/EP1637660B1/fr
Priority to AT05027595T priority patent/ATE462047T1/de
Priority to AU2002320130A priority patent/AU2002320130B2/en
Priority to AT02749631T priority patent/ATE365249T1/de
Priority to BRPI0216017-0A priority patent/BR0216017B1/pt
Priority to CA002451306A priority patent/CA2451306C/fr
Priority to EP02749631A priority patent/EP1404926B1/fr
Priority to HK05100954.9A priority patent/HK1068659B/xx
Priority to ES02749631T priority patent/ES2287298T3/es
Priority to KR1020047000151A priority patent/KR100992643B1/ko
Priority to DE60234652T priority patent/DE60234652D1/de
Priority to MX2010001598A priority patent/MX343761B/es
Priority to DE60234771T priority patent/DE60234771D1/de
Priority to DE20221725U priority patent/DE20221725U1/de
Priority to KR1020107004746A priority patent/KR101017165B1/ko
Priority to PCT/US2002/019794 priority patent/WO2003004782A2/fr
Priority to BRPI0210755-4A priority patent/BR0210755B1/pt
Priority to ES05027594T priority patent/ES2337798T3/es
Priority to DE60220795T priority patent/DE60220795T2/de
Priority to MXPA04000163A priority patent/MXPA04000163A/es
Priority to JP2003510530A priority patent/JP4295085B2/ja
Priority to NZ530359A priority patent/NZ530359A/en
Priority to CNB028154606A priority patent/CN100338316C/zh
Priority to CNB028136578A priority patent/CN1274917C/zh
Priority to JP2003510529A priority patent/JP4727920B2/ja
Priority to DE60235777T priority patent/DE60235777D1/de
Priority to PT05027595T priority patent/PT1637661E/pt
Priority to PT05027594T priority patent/PT1637660E/pt
Priority to EP02749630A priority patent/EP1404925B1/fr
Priority to DK05027594.0T priority patent/DK1637660T3/da
Priority to MXPA03012025A priority patent/MXPA03012025A/es
Priority to CN2005100970649A priority patent/CN1800522B/zh
Priority to KR1020047000180A priority patent/KR101024445B1/ko
Priority to ES05027595T priority patent/ES2341868T3/es
Priority to AU2002320131A priority patent/AU2002320131B2/en
Priority to DK02749630.6T priority patent/DK1404925T3/da
Priority to NZ530392A priority patent/NZ530392A/xx
Priority to EP05027595A priority patent/EP1637661B1/fr
Priority to NZ545677A priority patent/NZ545677A/en
Priority to PCT/US2002/019795 priority patent/WO2003004783A2/fr
Priority to MYPI20063208A priority patent/MY144084A/en
Priority to PE2002000606A priority patent/PE20030270A1/es
Priority to ARP020102539A priority patent/AR034737A1/es
Priority to MYPI20022547A priority patent/MY135424A/en
Priority to ARP020102541A priority patent/AR034738A1/es
Priority to MYPI20063209A priority patent/MY143623A/en
Priority to MYPI20022551A priority patent/MY133535A/en
Priority to PE2002000605A priority patent/PE20030264A1/es
Publication of US20030005606A1 publication Critical patent/US20030005606A1/en
Priority to US10/714,884 priority patent/US7100315B2/en
Priority to NO20040022A priority patent/NO336703B1/no
Priority to ZA2004/00020A priority patent/ZA200400020B/en
Priority to NO20040025A priority patent/NO336692B1/no
Priority to ZA200400018A priority patent/ZA200400018B/en
Application granted granted Critical
Publication of US6735890B2 publication Critical patent/US6735890B2/en
Priority to ARP050105554A priority patent/AR055828A2/es
Priority to ARP050105553A priority patent/AR056635A2/es
Priority to US11/324,944 priority patent/US7367144B2/en
Priority to US11/498,407 priority patent/US7739814B2/en
Priority to HK06108698.2A priority patent/HK1088371B/xx
Priority to AU2007202035A priority patent/AU2007202035B2/en
Priority to AU2007202390A priority patent/AU2007202390C1/en
Priority to ARP080102849A priority patent/AR067394A2/es
Priority to JP2008231644A priority patent/JP4791516B2/ja
Priority to JP2008240705A priority patent/JP5335344B2/ja
Priority to JP2008240706A priority patent/JP4791517B2/ja
Assigned to BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT reassignment BANK OF AMERICA, N.A., AS ADMINISTRATIVE AGENT NOTICE OF GRANT OF SECURITY INTEREST IN PATENTS Assignors: ESCO CORPORATION
Priority to JP2011027323A priority patent/JP5248638B2/ja
Assigned to ESCO CORPORATION reassignment ESCO CORPORATION RELEASE BY SECURED PARTY (SEE DOCUMENT FOR DETAILS). Assignors: BANK OF AMERICA, N.A.
Assigned to ESCO GROUP LLC reassignment ESCO GROUP LLC MERGER AND CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). Assignors: ESCO CORPORATION, ESCO GROUP LLC
Adjusted expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2825—Mountings therefor using adapters
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2833—Retaining means, e.g. pins
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2808—Teeth
    • E02F9/2816—Mountings therefor
    • E02F9/2833—Retaining means, e.g. pins
    • E02F9/2841—Retaining means, e.g. pins resilient
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/28—Small metalwork for digging elements, e.g. teeth scraper bits
    • E02F9/2883—Wear elements for buckets or implements in general
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
    • F16B2200/69—Redundant disconnection blocking means
    • F16B2200/71—Blocking disengagement of catches or keys
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7018—Interfitted members including separably interposed key

Definitions

  • the present invention pertains to a wear assembly, and especially to a wear assembly for use with mining, excavating and earthmoving equipment.
  • the inventive design is particularly well suited for an excavating tooth, but may also be used for the support of other wear members.
  • wear members are typically provided along the digging edge of the equipment to protect the bucket or the like and/or to engage and break up the ground to be gathered. Accordingly, the wear parts are subjected to highly abrasive conditions and experience considerable wearing. The wear parts must then be replaced on a periodic basis.
  • the wear assemblies are typically manufactured as two or more separable components including an adapter and a wear member.
  • the adapter is attached to the digging edge by welding, mechanical attachment, or being cast along an edge of the excavating device so as to present a forwardly projecting nose for supporting the wear member.
  • the wear member has a socket that is received over the nose, and a forward working end. In a point, the working end is typically a narrowed digging edge.
  • the wear member substantially envelops the adapter nose and thereby tends to protect the nose from wear. For example, depending on a variety of factors, generally five to twenty points can be successively mounted on a single adapter before the adapter becomes worn and in need of replacement.
  • the wear member is usually secured to the adapter nose by a removable lock (e.g., a lock pin).
  • the vertical component of reaction force A in general, equals the downward load P plus the vertical component of reaction force B.
  • the horizontal component of each of the reaction forces A and B is in a forward direction that tends to urge the point off the nose. To the extent these forces are not resisted directly by the geometry and friction of the nose and socket, they are resisted as shear loads by the lock pin. The repeated application of high shear loads can place unacceptably high stresses on the lock pin and result in its breakage.
  • a take-up elastomer has often been placed in front of the lock pin in an effort to maintain a tight fit between the point and adapter when wearing begins to develop. While the elastomer functions to pull the point onto the adapter, it also reduces the lock's ability to resist the applied moment and reverse forces. These loads tend to place more stress on the elastomer than it can withstand. As a result, during use, overworking of the elastomer can result in its premature failure and loss of the lock pin, which then results in loss of the point.
  • the front end of the nose 2 ′ and socket 3 ′ are each provided with a squared configuration having upper and lower stabilizing flats 5 ′, 6 ′.
  • a central downward load P′ on the free end 4 c ′ of the point 4 ′ will be transmitted to the nose tip 2 a ′ so as to generate a vertical reaction force A′ which generally has no substantial horizontal component tending to eject the point from the nose.
  • the reaction force B′ will still generate a substantial forward horizontal component at the rear of the point that tends to push the point from the nose. While this design improves the stability of the point over the conventional tooth system, it still applies a substantial ejection force and can place high shear forces on the lock.
  • the nose and socket are each provided with a front squared section and rear bearing surfaces that are substantially parallel to the longitudinal axis of the tooth.
  • the combined effect of the front stabilizing flats and parallel bearing surfaces create reaction forces at the tip and base of the nose that are generally only vertical.
  • Such vertical reaction forces will in general not generate substantial horizontal components. Accordingly, this construction greatly reduces the forces tending to push the point off of the adapter.
  • Such stabilizing of the point also reduces shifting and movement of the point on the adapter nose for reduced wearing. Nevertheless, multiple other factors (such as impacts, etc.) as well as reverse forces can still apply high shear forces to the lock.
  • the point and adapter are each provided with a helical turn or thread so that the point is rotated about its longitudinal axis when mounted on the adapter nose.
  • the point rotates about the longitudinal axis of the tooth and generally presses the lock against the adapter nose when ejection forces are applied.
  • the lock is much less likely to fail when under these kinds of compression forces as opposed to the high shear forces applied in conventional teeth. While this construction provides great strength and retention benefits, the nose and socket are complex and more expensive to manufacture.
  • the present invention pertains to a wear assembly that provides a stable coupling which is able to resist heavy loading without placing undue stress on the lock.
  • a wear assembly includes bearing surfaces that are formed such that the wear member is tightened onto the adapter with the application of certain loads on the wear member.
  • the bearing surfaces are oriented such that the horizontal components of reaction forces generated to resist, for example, centrally applied vertical loads are directed rearward so as to push the wear member more tightly onto the adapter nose.
  • the wear member rotates on and off of the adapter about its longitudinal axis to better resist ejection forces.
  • the rotation is accomplished with generally linear rails and grooves that are easy and inexpensive to manufacture.
  • These complementary rails and grooves enable the assembly to have a more slender profile than otherwise possible with helical threads for better penetration in excavation uses and less use of metal.
  • Such grooves and rails also avoid the generation of high stress risers due to the use of relatively sharp grooves used to form helical threads.
  • the adapter nose or socket of the wear member is formed with rails that diverge as they extend rearward.
  • the complementary nose or socket then includes grooves that matingly receive the rails.
  • the vertical divergence of the rails precludes an axial mounting of the wear member and requires the wear member to twist as it is moved onto or off of the adapter nose.
  • the adapter in another aspect of the invention, includes two bearing surfaces positioned on opposite sides of the longitudinal axis and facing in opposite directions. In a preferred embodiment, these bearing surfaces reduce wear on the extreme fibers on the top and bottom of the nose. Moreover, the bearing surfaces are preferably formed as part of rails on the adapter so as to form a generally Z-shaped cross-section.
  • the adapter nose and socket of the wear member widen as they extend forwardly.
  • the adapter and socket include complementary rails and grooves that diverge to require twisting of the wear member during installation. This construction provides sufficient clearance to receive the forwardly widened nose into the socket to better resist ejection of the wear member.
  • the lock is tapered to fit into a complementary channel to reduce frictional forces and ease the insertion and removal of the lock.
  • the length of the lock does not frictionally slide through aligned openings, but rather engages the sides of the channel at or near the place of engagement. Hammering of the lock as it is inserted or removed is avoided.
  • the lock includes a lock member to secure the lock in the channel to prevent unwanted loss or ejection.
  • FIG. 1 is a perspective view of an excavating tooth system in accordance with the present invention.
  • FIG. 2 is an exploded perspective view of the tooth system.
  • FIG. 3 is a front elevational view of an adapter for the tooth system.
  • FIG. 4 is a front view of the adapter nose only with the front bearing surface parallel to the plane of the view.
  • FIG. 5 is a rear perspective view of a point for the tooth system.
  • FIG. 6 is a rear elevational view of the point.
  • FIG. 7 is a partial, top view of the tooth system.
  • FIG. 9 is a side elevational view of the point positioned for mounting onto the adapter nose.
  • FIG. 10 is a partial cross-sectional view of the point mounted onto the adapter.
  • FIG. 11 is a vector force diagram of the tooth system in accordance with FIGS. 1 and 2.
  • FIG. 12 is a perspective view of an alternative embodiment of a tooth system in accordance with the present invention.
  • FIG. 13 is a vector force diagram of the tooth system in accordance with FIG. 12 .
  • FIG. 14 is a side elevational view of an adapter of another alternative embodiment of a tooth system in accordance with the present invention.
  • FIG. 15 is an exploded perspective view of a second tooth system in accordance with the present invention with an alternative lock.
  • FIG. 16 is a partial side view of the second tooth system with the alternative lock in its locking position.
  • FIG. 17 is a partial cross-sectional view taken along line 17 — 17 in FIG. 16 .
  • FIG. 18 is a perspective view of the alternative lock.
  • FIG. 20 is a side view of another alternative lock inserted into a tooth system.
  • FIG. 20 a is a perspective view of the lock shown in FIG. 20 .
  • FIG. 20 b is a side view of the lock shown in FIG. 20 .
  • FIG. 21 is a side view of another alternative lock inserted into a tooth system.
  • FIG. 21 a is a perspective view of the lock shown in FIG. 21 .
  • FIG. 21 b is a perspective view of the lock shown in FIG. 21 with the base portions of the elastomer and detents shown in phantom.
  • FIG. 22 is a vector force diagram of a conventional tooth system.
  • the present invention is directed to a wear assembly for protecting a wear surface.
  • the wear assembly is especially adapted for use in excavating, mining, construction and the like.
  • the wear assembly is well suited for use in forming an excavating tooth system, but could also be used to form other wear members.
  • the present application describes the inventive construction as an excavating tooth system.
  • wear parts e.g., a shroud
  • the production of other wear parts would utilize the same nose and socket constructions, but could have different working and mounting ends.
  • terms such as upper, lower, vertical, etc. are used in this specification and are to be understood as pertaining to the tooth system as oriented in FIG. 1 .
  • the use of these terms is not an indication that these particular orientations are required for the wear assembly.
  • the wear assembly could be oriented differently than as illustrated in FIG. 1 .
  • the nose is generally wedge shaped and formed by converging walls 24 , 26 , sidewalls 28 , 30 , and a front bearing surface 32 .
  • Bearing surface 32 is adapted to receive axially directed loads applied to the wear member 12 .
  • the converging walls 24 , 26 are preferably formed with a gentle transverse curve for enhanced strength and durability (FIGS. 3 and 8 ), although they could be flat, provided with a greater curvature, or formed with another configuration.
  • the sidewalls 28 , 30 extend in generally parallel planes, although preferably with a slight taper. However, the sidewalls could be formed with a substantial inclination if desired.
  • the transition edges between the converging walls and the sidewalls are generally rounded to minimize the concentration of stress at these locations.
  • the sidewalls 28 , 30 of the nose 18 are each formed with a flank 34 and a rail 35 having an outer surface 36 and a lateral surface 37 (FIGS. 2, 3 , 4 and 9 ).
  • the rails 35 extend rearward in substantially parallel planes (i.e., with the rearward extension of the sidewalls), they diverge from each other as they extend rearward.
  • one rail 35 a extends from bearing surface 32 in a rearward direction that is substantially parallel to the rearward extension of converging wall 26
  • one rail 35 b extends rearwardly from bearing surface 32 in a direction that is substantially parallel to converging wall 24 .
  • the rails 35 a and 35 b diverge in generally vertical directions as they extend rearward.
  • the rails are preferably formed with linear faces and generally constant depths and widths, primarily for easier manufacturing. However, other configurations are possible.
  • one rail extends adjacent and substantially parallel to each converging wall 24 , 26 . Accordingly, an outside edge of each converging wall 24 , 26 defines the top or bottom of the adjacent rail while lateral surface 37 extends generally parallel to the rearward extension of the converging wall. Nevertheless, variations are possible.
  • the lateral surfaces may have a non-linear shape or an extension that is not parallel to the converging wall.
  • the rails may be spaced from the converging walls such that they could have a second lateral surface (not shown) apart from the converging walls 24 , 26 .
  • each rail 35 is substantially vertical.
  • the lateral surface 37 and flank 34 are inclined to form a generally V-shaped recess 40 (FIGS. 3 and 8 ).
  • the lateral surface 37 and flank 34 each present a surface area that is transverse to vertical to form primary bearing surfaces for vertical and lateral loads applied to the point 12 .
  • the converging walls 24 , 26 form secondary bearing surfaces that may contact the socket under heavy loading or after wearing of the parts.
  • Each lateral surface 37 is preferably set at an angle of 75 to 115 degrees relative to its respective flank 34 , and most preferably at an angle of 95 degrees. Nevertheless, other angles could be used.
  • the flanks 34 are generally triangular in shape such that they expand as they extend rearward to form an increasingly greater portion of each sidewall 28 , 30 .
  • lateral surface 69 and inner surface 71 form primary bearing surfaces for generally vertically applied loads, whereas the converging surfaces 55 , 57 form secondary bearing surfaces that may contact the nose under heavy loading or after wearing of the parts.
  • the front surface 63 is adapted to abut bearing surface 32 during axial loading.
  • a rearwardly extending nose could be provided on the point to be received in a socket defined in the adapter.
  • the socket and nose constructions could be reversed so that internal rails (not shown) could be provided in the socket with mating grooves provided on the nose (not shown).
  • the point 12 On account of the diverging rails 35 and grooves 65 , the point 12 must be turned or rotated as it is fit onto the adapter nose 18 . In the preferred construction, the point rotates on the order of an eighth of a turn as it is installed. As a result, the point fits onto the adapter nose in much the same way as if the point and adapter were formed with helical threads rather than with straight rails and grooves.
  • the point 12 is mounted to the nose 18 by first orienting the point 12 with respect to the nose 18 so that the rear portion 73 of each groove 65 is located adjacent to the front portion 75 of a corresponding rail 35 in order to receive the rail, as shown in FIG. 9 .
  • the present invention thus achieves certain advantages provided by the earlier wear assemblies provided with helical threads (e.g., U.S. Pat. No. 4,353,532), but with a simpler and less expensive geometry to manufacture.
  • the opposing rails of the present invention are easier to cast than the helical thread assemblies.
  • the use of larger rails and grooves instead of sharper helical grooves lowers the stress risers in the nose for enhanced strength and durability.
  • the degree of twist can be varied by changing the angle defining the divergence of the rails. In general, the greater the angle, the greater the amount of twist the point undergoes during installation and removal.
  • the point 12 is stably positioned on the adapter nose 18 .
  • a centrally applied vertical load P 1 on the free end 51 of the point 12 generates a smaller ejection force on account of the horizontal components of the reaction forces A 1 and B 1 (FIG. 11 ).
  • a central downward load P 1 on the free end 51 of the point 12 generates reaction forces A 1 and B 1 at the tip and base of the nose 18 .
  • the vertical component of reaction force A 1 is generally the same as the load P 1 plus the vertical component of reaction force B 1 .
  • This construction provides a substantial improvement in point stability.
  • the generation of the resultant tightening forces will lessen loading on the lock pin and reduce the risk of point loss.
  • the resultant tightening forces will also tend to reduce the movement of the point on the adapter nose, which in turn will reduce the wearing of the tooth construction.
  • the manufacturing tolerances can be loosened for easier and less expensive manufacturing, the use of take-up style lock pins (with load bearing elastomers) can be eliminated, and gauging requirements can be reduced without shortening the useful life of the tooth. Instead, the tooth will have enhanced durability.
  • the bearing surfaces are closer to the central horizontal plane of the tooth system, wearing of these surfaces has less affect on the ability of the nose to withstand high bending loads than wearing of the outer converging walls. With less wearing, the tooth system of the present invention is a stronger and more durable assembly. As a result, a smaller tooth system made in accordance with the present invention, which requires less metal and has better penetration, can replace bigger conventional tooth systems. Moreover, this reduction of wear in the extreme fibers will enable the section modulus to remain nearly the same throughout the life of the nose to maintain nose strength.
  • the front end of the nose and corresponding socket can actually be wider than the rear end of the nose; that is, the sidewalls can be tapered to diverge slightly at an angle up to about 5 degrees as they extend forward.
  • This expansion of the nose and socket widths at the front of the nose will tend to restrict the paths for removing the point from the nose to the designed rotation even as wearing occurs.
  • this construction provides increased resistance to forces tending to remove the point and especially reverse forces.
  • the nose can be provided with longitudinally extending rails 80 that include outer faces 81 and lateral bearing faces 83 (FIG. 14 ).
  • the lateral bearing surfaces 83 are generally parallel to each other and to the longitudinal axis X of the tooth.
  • the depth of the rails preferably increases as the rails extend rearward; that is the converging walls of the nose form the upper or lower surfaces of the respective rails 80 even though the lateral surfaces 83 extend rearwardly in an orientation that is generally parallel to the longitudinal axis of the tooth.
  • the rails could have a constant depth and simply be spaced from the respective converging wall. Without the divergence of the rails, the point is not rotated onto the adapter nose.
  • the rails still continue to provide a stabilizing surface (as compared to the conventional tooth system) that reduces the stresses in the extreme fibers of the converging walls and, as discussed above, reduces the wearing of the bearing faces on resisting the bending forces.
  • the use of only two rails that form a generally Z-shaped cross section improves the noted loading and wearing benefits for a reduced amount of material.
  • This embodiment can further be used when twisting of the point during installation is not desired or possible.
  • the points could be welded to a plate and the assembly then mounted collectively to the projecting adapter noses along the digging edge.
  • the nose and points are preferably formed to be rotationally symmetrical about the longitudinal axis X so that the points can be reversibly mounted on the nose. Nevertheless, asymmetrical nose and/or points could be used in this invention.
  • FIG. 2 shows a lock 16 in the form of a drive through lock pin that is received in a vertical channel 89 in the side of the nose.
  • the point is provided with at least one rearwardly extending ear 91 having an inwardly extending lug 93 to engage the rear side of the pin and retain the point to the adapter.
  • an ear and lug is provided on both sides of the point (not shown) so that the point can be reversible mounted in either of 180 degree positions.
  • the channel and pin are shown with a linear configuration, they could be curved as in U.S. Pat. No. 4,965,945 to Emrich.
  • a tapered locking pin 16 ′ is provided to secure the point to the adapter.
  • a nose 18 ′ has a tapered vertical channel 103 along one side for receiving a tapered locking pin 16 ′.
  • the lock can be tapered along its entire length, it only needs to be tapered along a substantial portion of its length.
  • the front surface 104 gradually arcs rearward the entire length of the lock so that the taper extends along substantially the entire length of the lock.
  • FIG. 15 shows a blind channel that extends only partially through the nose and tapers to a closed end 105 at the bottom. Nevertheless, an open channel that extends entirely through the adapter could be used with the tapered pin if desired.
  • the locking pin 16 ′ has a corresponding tapered shape to fit within the tapered channel 103 (FIGS. 15 - 18 ).
  • the locking pin 16 ′ preferably terminates in a narrow point 106 .
  • the pin 16 ′ has a bearing portion 107 that has a front surface 104 for engaging the shoulder 109 of the nose (i.e., the front edge of channel 103 ) and a rear surface for engaging the lug 93 ′ of the ear 91 ′.
  • the locking pin 16 ′ has a web 111 that extends rearward to strengthen the lock against axial forces and ensure proper insertion of the lock pin.
  • the lock pin could have a uniform circular, rectangular or other shape as desired.
  • the nose 18 ′ defines a slot 113 in communication with the channel 103 to allow the lug 93 ′ and ear 91 ′ to pass along the side of the nose to a position within the channel.
  • the pin 16 ′ defines a recess 115 behind the rear surface 107 and proximate to the web 111 for receiving a portion of the lug 93 ′.
  • the locking pin 16 ′ may be formed from any conventional method, such as by casting.
  • the lock pin 16 ′ could also be used in conjunction with other wear assemblies.
  • the lock pin could be used to retain a point 128 with a simple wedge shaped socket, ears 132 , lugs 130 .
  • a tapered lock pin in accordance with the present invention could also be used in tooth systems having vertical or horizontal central holes (not shown).
  • locking members may be provided, such as an elastomer backed detent to resist removal of the pin from the groove.
  • the locking member may instead operably engage the locking pin to the point.
  • the locking member need not be attached to the locking pin, but instead may be a separate member or attached to the adapter or point (see, for example, the plug in U.S. Pat. No. 4,965,945).
  • lock pins 131 , 133 have tapered constructions that could be used in place of lock pin 16 ′.
  • Lock pin 131 has a detent 134 that is biased outward at one end 136 by an elastomer 138 to fit under a ledge 140 defined in the adapter nose.
  • the detent preferably has a projecting contact surface 136 a to form a secure engagement with ledge 140 .
  • the detent 134 is preferably adhered to elastomer 138 which in turn is adhered in a pocket of the cast body 135 .
  • the detent 141 In lock pin 133 , the detent 141 , is biased to move along an arcuate path 143 by an elastomer 145 .
  • the free end 147 of the detent 141 engages a notch 149 or the like defined in the adapter nose.
  • the adapter nose includes a narrow slot (not shown) whereby a tool can be inserted to push the detents into the elastomers to release the detents 134 , 141 when removal of the locks is desired.
  • tapered lock pin of the present invention Another advantage of the tapered lock pin of the present invention is that the force required to remove the lock with the lock member engaged is greater than that required to remove a conventional drive-through locking pin.
  • the tapered locking pin is prevented from moving downward because the groove narrows or terminates, and the locking member, such as the set screw, prevents the lock pin from moving upward out of the groove.
  • the lock pin thus relies on mechanical interference, rather than a tight fit, to prevent removal of the tapered locking pin once installed.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)
  • Earth Drilling (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Mechanical Operated Clutches (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Helmets And Other Head Coverings (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Casting Support Devices, Ladles, And Melt Control Thereby (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Road Repair (AREA)
US09/899,535 1977-11-05 2001-07-06 Wear assembly Expired - Lifetime US6735890B2 (en)

Priority Applications (76)

Application Number Priority Date Filing Date Title
US09/899,535 US6735890B2 (en) 2001-07-06 2001-07-06 Wear assembly
US10/187,446 US6993861B2 (en) 2001-07-06 2002-07-02 Coupling for excavating wear part
ES05027595T ES2341868T3 (es) 2001-07-06 2002-07-03 Conjunto de desgaste.
NZ545677A NZ545677A (en) 2001-07-06 2002-07-03 Wear assembly
EP02749630A EP1404925B1 (fr) 2001-07-06 2002-07-03 Couplage pour l'excavation d'un element d'usure
KR1020047000180A KR101024445B1 (ko) 2001-07-06 2002-07-03 마모 조립체
AT02749630T ATE452248T1 (de) 2001-07-06 2002-07-03 Kupplung für ein bagger-verschleissteil
CA002451309A CA2451309C (fr) 2001-07-06 2002-07-03 Ensemble d'usure
BRPI0216099-4B1A BR0216099B1 (pt) 2001-07-06 2002-07-03 "conjunto de desgaste".
PT02749630T PT1404925E (pt) 2001-07-06 2002-07-03 Acoplamento para peça de desgaste de escavadora
ES02749630T ES2336897T3 (es) 2001-07-06 2002-07-03 Acoplamiento para pieza desgastable de excavadora.
CN2006100740567A CN1837518B (zh) 2001-07-06 2002-07-03 用于挖掘耐磨部件的联接器
AT05027594T ATE450663T1 (de) 2001-07-06 2002-07-03 Verschleissteil und -anordnung
EP05027594A EP1637660B1 (fr) 2001-07-06 2002-07-03 Elément et ensemble d'usure
AT05027595T ATE462047T1 (de) 2001-07-06 2002-07-03 Verschleissanordnung
AU2002320130A AU2002320130B2 (en) 2001-07-06 2002-07-03 Coupling for excavating wear part
AT02749631T ATE365249T1 (de) 2001-07-06 2002-07-03 Verschleissanordnung
BRPI0216017-0A BR0216017B1 (pt) 2001-07-06 2002-07-03 conjunto de desgaste.
CA002451306A CA2451306C (fr) 2001-07-06 2002-07-03 Couplage pour l'excavation d'un element d'usure
EP02749631A EP1404926B1 (fr) 2001-07-06 2002-07-03 Ensemble d'usure
HK05100954.9A HK1068659B (en) 2001-07-06 2002-07-03 Wear assembly and wear member
ES02749631T ES2287298T3 (es) 2001-07-06 2002-07-03 Conjunto de desgaste.
CN2005100970649A CN1800522B (zh) 2001-07-06 2002-07-03 耐磨组件及耐磨构件
DE60234652T DE60234652D1 (de) 2001-07-06 2002-07-03 Verschleissteil und -anordnung
MX2010001598A MX343761B (es) 2001-07-06 2002-07-03 Ensamble de desgaste.
DE60234771T DE60234771D1 (de) 2001-07-06 2002-07-03 Kupplung für ein bagger-verschleissteil
DE20221725U DE20221725U1 (de) 1977-11-05 2002-07-03 Verschleisseinrichtung
KR1020107004746A KR101017165B1 (ko) 2001-07-06 2002-07-03 굴착 마모 부품용 커플링
PCT/US2002/019794 WO2003004782A2 (fr) 2001-07-06 2002-07-03 Couplage pour l'excavation d'un element d'usure
BRPI0210755-4A BR0210755B1 (pt) 2001-07-06 2002-07-03 elemento de desgaste para escavadeira.
ES05027594T ES2337798T3 (es) 2001-07-06 2002-07-03 Elemento y conjunto de desgaste.
DE60220795T DE60220795T2 (de) 2001-07-06 2002-07-03 Verschleisseinrichtung
MXPA04000163A MXPA04000163A (es) 2001-07-06 2002-07-03 Acoplamiento para excavar una parte de desgaste.
JP2003510530A JP4295085B2 (ja) 2001-07-06 2002-07-03 摩耗アセンブリ
NZ530359A NZ530359A (en) 2001-07-06 2002-07-03 Wear assembly
CNB028154606A CN100338316C (zh) 2001-07-06 2002-07-03 挖掘机的耐磨元件、耐磨组件、锁件及耐磨元件的安装方法
CNB028136578A CN1274917C (zh) 2001-07-06 2002-07-03 耐磨组件及耐磨构件
JP2003510529A JP4727920B2 (ja) 2001-07-06 2002-07-03 掘削用の摩耗アセンブリ
DE60235777T DE60235777D1 (de) 2001-07-06 2002-07-03 Verschleissanordnung
PT05027595T PT1637661E (pt) 2001-07-06 2002-07-03 Conjunto de desgaste
PT05027594T PT1637660E (pt) 2001-07-06 2002-07-03 Elemento e conjunto de desgaste
DK05027595.7T DK1637661T3 (da) 2001-07-06 2002-07-03 Slidaggregat
DK05027594.0T DK1637660T3 (da) 2001-07-06 2002-07-03 Slidelement og slidaggregat
MXPA03012025A MXPA03012025A (es) 2001-07-06 2002-07-03 Ensamble de desgaste.
KR1020047000151A KR100992643B1 (ko) 2001-07-06 2002-07-03 굴착 마모 부품용 커플링
PCT/US2002/019795 WO2003004783A2 (fr) 2001-07-06 2002-07-03 Ensemble d'usure
BRPI0210854-2A BR0210854B1 (pt) 2001-07-06 2002-07-03 fecho para um conjunto de desgaste, mÉtodo para montagem de um elemento de desgaste e mÉtodo para remover um elemento de desgaste.
AU2002320131A AU2002320131B2 (en) 2001-07-06 2002-07-03 Wear assembly
DK02749630.6T DK1404925T3 (da) 2001-07-06 2002-07-03 Kobling til en sliddel til en gravemaskine
NZ530392A NZ530392A (en) 2001-07-06 2002-07-03 Coupling for excavating wear part
EP05027595A EP1637661B1 (fr) 2001-07-06 2002-07-03 Ensemble d'usure
MYPI20022551A MY133535A (en) 2001-07-06 2002-07-05 Wear assembly
PE2002000605A PE20030264A1 (es) 2001-07-06 2002-07-05 Conjunto de elementos de desgaste
MYPI20063208A MY144084A (en) 2001-07-06 2002-07-05 Wear assembly
PE2002000606A PE20030270A1 (es) 2001-07-06 2002-07-05 Union para pieza desgastada de excavadora
ARP020102539A AR034737A1 (es) 2001-07-06 2002-07-05 Conjunto de elementos de desgaste
MYPI20022547A MY135424A (en) 2001-07-06 2002-07-05 Coupling for excavating wear part
ARP020102541A AR034738A1 (es) 2001-07-06 2002-07-05 Acoplamiento para pieza desgastada de excavacion
MYPI20063209A MY143623A (en) 2001-07-06 2002-07-05 Wear assembly
US10/714,884 US7100315B2 (en) 2001-07-06 2003-11-18 Point and adapter assembly
NO20040022A NO336703B1 (no) 2001-07-06 2004-01-05 Slitesammenstilling omfattende nese, slitedel og lås
ZA200400018A ZA200400018B (en) 2001-07-06 2004-01-05 Wear assembly.
NO20040025A NO336692B1 (no) 2001-07-06 2004-01-05 Kopling for slitasjedel for graving
ZA2004/00020A ZA200400020B (en) 2001-07-06 2004-01-05 Coupling for excavating wear part
ARP050105554A AR055828A2 (es) 2001-07-06 2005-12-27 Conjunto de desgaste para una excavadora
ARP050105553A AR056635A2 (es) 2001-07-06 2005-12-27 Conjunto de desgaste y elemento de desgaste para una excavadora
US11/324,944 US7367144B2 (en) 2001-07-06 2006-01-04 Wear member for excavating equipment
US11/498,407 US7739814B2 (en) 2001-07-06 2006-08-02 Point and adapter assembly
HK06108698.2A HK1088371B (zh) 2001-07-06 2006-08-07 耐磨組件及耐磨構件
AU2007202035A AU2007202035B2 (en) 2001-07-06 2007-05-07 Wear assembly
AU2007202390A AU2007202390C1 (en) 2001-07-06 2007-05-25 Coupling for excavating wear part
ARP080102849A AR067394A2 (es) 2001-07-06 2008-07-01 Conjunto de desgaste para usar en excavaciones, seguro para dicho conjunto y metodo para montar un miembro de desgaste
JP2008231644A JP4791516B2 (ja) 2001-07-06 2008-09-10 摩耗アセンブリ並びに磨耗部材
JP2008240706A JP4791517B2 (ja) 2001-07-06 2008-09-19 掘削用の摩耗部材
JP2008240705A JP5335344B2 (ja) 2001-07-06 2008-09-19 掘削用の摩耗アセンブリ
JP2011027323A JP5248638B2 (ja) 2001-07-06 2011-02-10 掘削摩耗部品用カップリング

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/899,535 US6735890B2 (en) 2001-07-06 2001-07-06 Wear assembly

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US10/187,446 Continuation-In-Part US6993861B2 (en) 2001-07-06 2002-07-02 Coupling for excavating wear part
US10/714,884 Continuation US7100315B2 (en) 2001-07-06 2003-11-18 Point and adapter assembly

Publications (2)

Publication Number Publication Date
US20030005606A1 US20030005606A1 (en) 2003-01-09
US6735890B2 true US6735890B2 (en) 2004-05-18

Family

ID=25411164

Family Applications (3)

Application Number Title Priority Date Filing Date
US09/899,535 Expired - Lifetime US6735890B2 (en) 1977-11-05 2001-07-06 Wear assembly
US10/714,884 Expired - Lifetime US7100315B2 (en) 2001-07-06 2003-11-18 Point and adapter assembly
US11/498,407 Expired - Lifetime US7739814B2 (en) 2001-07-06 2006-08-02 Point and adapter assembly

Family Applications After (2)

Application Number Title Priority Date Filing Date
US10/714,884 Expired - Lifetime US7100315B2 (en) 2001-07-06 2003-11-18 Point and adapter assembly
US11/498,407 Expired - Lifetime US7739814B2 (en) 2001-07-06 2006-08-02 Point and adapter assembly

Country Status (21)

Country Link
US (3) US6735890B2 (fr)
EP (3) EP1637660B1 (fr)
JP (2) JP4295085B2 (fr)
KR (1) KR101024445B1 (fr)
CN (3) CN1837518B (fr)
AR (3) AR034737A1 (fr)
AT (3) ATE462047T1 (fr)
AU (2) AU2002320131B2 (fr)
BR (3) BR0216017B1 (fr)
CA (1) CA2451309C (fr)
DE (4) DE20221725U1 (fr)
DK (2) DK1637661T3 (fr)
ES (3) ES2337798T3 (fr)
MX (2) MX343761B (fr)
MY (3) MY144084A (fr)
NO (1) NO336703B1 (fr)
NZ (2) NZ530359A (fr)
PE (1) PE20030264A1 (fr)
PT (2) PT1637660E (fr)
WO (1) WO2003004783A2 (fr)
ZA (1) ZA200400018B (fr)

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US7739814B2 (en) 2010-06-22
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